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Фрагмент инструкции
MAX-CSE/MAX-CSD10 Operation/Reference Guide MAX-CSE Web Interface Stream Profiles Page The Stream Profiles page (FIG. 16) is accessed by clicking on the Stream Set-Up button in the Navigation Bar. The Stream Profiles page allows users (with the proper access rights) both to configure the properties of the outgoing media stream and set up the properties associated with communicating that stream to an external IP-enabled device capable of receiving and processing the data. FIG. 16 Stream Profiles page IP Multicasting is supported under both the UPD and RTP communication protocols. .. UDP (User Datagram Protocol) is a connectionless protocol, much like TCP, that runs on top of IP networks. Unlike TCP/IP, UDP/IP provides a direct way to send and receive datagrams over an IP network. It's primarily used for broadcasting messages over a network. Data is sent as a Transport Stream by using only the MPEG-2 codec. MAX-CSE/MAX-CSD10 Operation/Reference Guide MAX-CSE Web Interface .. In a UDP stream, only a Target (video) Port is needed since both the audio and video information are transported together to the same port on the destination device. .. RTP (Real-Time Transport Protocol) is an Internet protocol used for transmitting real-time data such as audio and video as separate entities. Data is sent as an Elementary Stream which can use both the MPEG-2 and MPEG-4 codecs. .. In an RTP stream, both a Target (video) Port and Target Audio Port are required because the audio and video are delivered to a destination as separate data elements. These elements are then directed to two separate ports where they are then "synced-up" by target device/application. If using RTP, both the Target Port and Target Audio Port must be different. .. When the a lower quality Encoder Profile is used (such as Standard Quality or lower), the Stream parameters default to using RTP as a Transport Protocol. This is because lower quality video uses MPEG-4 compression which must be sent via RTP. .. IP Multicasting is a method of sending out large amounts of data. IP Multicast allows a server to broadcast a message to many recipients simultaneously. Unlike traditional Internet communication, that requires separate connections for each source-destination pair, IP Multicasting allows several recipients to share data from the same source. This means that just one set of packets is transmitted to all the destinations. .. An ideal method of sharing a single stream to several destinations. .. One of the best uses for this method would be if an educator (or institution) wanted to stream (via either UDP or RTP) its lecture series to a variety of students simultaneously around the world. Every student could connect and receive the stream without having to wait their turn to view the content or see a severe drop in transmission quality. The following table lists the Stream Profiles page features that an administrator or other authorized user can configure. Refer to FIG. 16 as an example. Stream Profiles Page Features Feature Description Encoder Profile: A drop-down list of preset encoding profile names which the user can choose from when assigning a particular set of audio/video encoding settings. • Although the default selection is Home Theater (Max), the user can choose from up to 6 pre-created entries and one Custom entry which makes every field user- definable. • Refer to the Encoder Profiles and Parameters table on page 31 to view the details of these pre-defined audio/video encoding parameters. Video: This section allows the user/administrator to define the encoding parameters for the video portion of the outgoing stream. Codec A drop-down list of codecs from which the user can choose the type of MPEG video compression used for the outgoing video stream. • Available MPEG codecs: MPEG-2 (default) or MPEG-4 • MPEG-2 is typically used to encode audio and video for broadcast quality signals. The MPEG-2 is enhanced by using MPEG-1's audio (MP2) component to allow the coding of audio programs with more than two channels. Video quality is noticeably higher with MPEG-2 vs. MPEG-4. • MPEG-4 is currently used as a standard for the web (streaming media) and CD distribution, conversational (videophone), and broadcast television. The biggest difference between these two encoding types is that MPEG-4 uses about 1/3 to 1/2 less bandwidth for the same quality of video. MAX-CSE/MAX-CSD10 Operation/Reference Guide MAX-CSE Web Interface Stream Profiles Page Features (Cont.) Feature Description • Video In Rate • Resolution A drop-down list of data rates which allows the user to choose the amount of incoming video data throughput available for use by the MAX-CSE. • The larger the amount of available video data coming through the unit for encoding, the better the outgoing video quality to the target IP device. • Available video data rates: 6Mbps - 500Kbps A drop-down list of resolution settings which allow the user to choose from two preset resolution types. These options...
Эта инструкция также подходит к моделям:Ресиверы и усилители - MAX-CSE (1.72 mb)